[英]How do I modify a dependency of an injected dependency in angular?
我正在查看JQuery File上傳的angular插件的源代碼,並且看到以下代碼:
angular.module('blueimp.fileupload', [])
// The fileUpload service provides configuration options
// for the fileUpload directive and default handlers for
// File Upload events:
.provider('fileUpload', function () { ... })
.controller('FileUploadController', [
'$scope', '$element', '$attrs', '$window', 'fileUpload',
function ($scope, $element, $attrs, $window, fileUpload) {
...
// Observe option changes:
$scope.$watch(
$attrs.fileUpload,
function (newOptions) {
if (newOptions) {
$element.fileupload('option', newOptions);
}
}
);
因此,對我來說顯而易見的是,該模塊被編寫為允許我更新fileupload小部件上的選項(這是$ element.fileupload('option',...)的作用); 但是,我不確定如何到達$ attrs.fileUpload。
在控制器中進行異步調用后,我需要更新文件上傳選項:
var accountEditor = angular.module('accountEditor', [ 'ngResource', 'blueimp.fileupload' ]);
accountEditor.controller('accountEditorCtrl', [
'$scope',
'$resource',
'fileUpload',
function($scope, $resource, fileUpload) {
doAsyncThing(function() {
// update options...what goes here?
});
我當前的解決方案是破解,它會弄亂事件回調中的選項(如如何使用$ scope?動態更改上載(jquery-file-upload)URL中所述 )。 我認為這是一種破解,因為它需要用戶交互才能設置選項,並且還會導致競爭狀態,在異步調用完成之前,可能會發生用戶交互。
您有查看代碼嗎?
我想您將需要更新控制器上的options屬性。
例如
視圖:
<div data-ng-controller="accountEditorCtrl">
<form data-ng-controller="FileUploadController" data-file-upload="options">
</options>
</div>
控制器:
var accountEditor = angular.module('accountEditor', [ 'ngResource', 'blueimp.fileupload' ]);
accountEditor.controller('accountEditorCtrl', [
'$scope',
'$resource',
'fileUpload',
function($scope, $resource, fileUpload) {
$scope.options = {}; // Set options here
doAsyncThing(function() {
$scope.options = {}; // Update options
// Note if this async method is not handled by angular you may need
// to call $scope.$apply(); to notify angular of the changes to scope
});
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